Khan, Sarif

[["dc.bibliographiccitation.artnumber","133"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Journal of High Energy Physics"],["dc.bibliographiccitation.volume","2022"],["dc.contributor.author","Bélanger, Geneviève"],["dc.contributor.author","Choubey, Sandhya"],["dc.contributor.author","Godbole, Rohini M."],["dc.contributor.author","Khan, Sarif"],["dc.contributor.author","Mitra, Manimala"],["dc.contributor.author","Roy, Abhishek"],["dc.date.accessioned","2022-11-28T11:27:37Z"],["dc.date.available","2022-11-28T11:27:37Z"],["dc.date.issued","2022-11-23"],["dc.date.updated","2022-11-28T08:12:54Z"],["dc.description.abstract","Abstract\n \n We present an extension of the SM involving three triplet fermions, one triplet scalar and one singlet fermion, which can explain both neutrino masses and dark matter. One triplet of fermions and the singlet are odd under a Z2 symmetry, thus the model features two possible dark matter candidates. The two remaining Z2-even triplet fermions can reproduce the neutrino masses and oscillation parameters consistent with observations. We consider the case where the singlet has feeble couplings while the triplet is weakly interacting and investigate the different possibilities for reproducing the observed dark matter relic density. This includes production of the triplet WIMP from freeze-out and from decay of the singlet as well as freeze-in production of the singlet from decay of particles that belong to the thermal bath or are thermally decoupled. While freeze-in production is usually dominated by decay processes, we also show cases where the annihilation of bath particles give substantial contribution to the final relic density. This occurs when the new scalars are below the TeV scale, thus in the reach of the LHC. The next-to-lightest odd particle can be long-lived and can alter the successful BBN predictions for the abundance of light elements, these constraints are relevant in both the scenarios where the singlet or the triplet are the long-lived particle. In the case where the triplet is the DM, the model is subject to constraints from ongoing direct, indirect and collider experiments. When the singlet is the DM, the triplet which is the next-to-lightest odd particle can be long-lived and can be probed at the proposed MATHUSLA detector. Finally we also address the detection prospects of triplet fermions and scalars at the LHC."],["dc.identifier.citation","Journal of High Energy Physics. 2022 Nov 23;2022(11):133"],["dc.identifier.doi","10.1007/JHEP11(2022)133"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/117765"],["dc.language.iso","en"],["dc.publisher","Springer Berlin Heidelberg"],["dc.rights.holder","The Author(s)"],["dc.subject","Models for Dark Matter"],["dc.subject","Particle Nature of Dark Matter"],["dc.title","WIMP and FIMP dark matter in singlet-triplet fermionic model"],["dc.type","journal_article"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","055047"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","104"],["dc.contributor.author","Bélanger, Geneviève"],["dc.contributor.author","Khan, Sarif"],["dc.contributor.author","Padhan, Rojalin"],["dc.contributor.author","Mitra, Manimala"],["dc.contributor.author","Shil, Sujay"],["dc.date.accessioned","2021-12-01T09:23:52Z"],["dc.date.available","2021-12-01T09:23:52Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1103/PhysRevD.104.055047"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/94778"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-478"],["dc.relation.eissn","2470-0029"],["dc.relation.issn","2470-0010"],["dc.title","Right handed neutrinos, TeV scale BSM neutral Higgs boson, and FIMP dark matter in an EFT framework"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","99"],["dc.contributor.author","Dev, P. S. Bhupal"],["dc.contributor.author","Khan, Sarif"],["dc.contributor.author","Mitra, Manimala"],["dc.contributor.author","Rai, Santosh Kumar"],["dc.date.accessioned","2021-11-22T14:31:47Z"],["dc.date.available","2021-11-22T14:31:47Z"],["dc.date.issued","2019"],["dc.description.abstract","We explore the discovery prospect of the doubly-charged component of an SU(2)L-triplet scalar at the future e−p collider FCC-eh, proposed to operate with an electron beam energy of 60 GeV and a proton beam energy of 50 TeV. We consider the associated production of the doubly-charged Higgs boson along with leptons and jet(s), and its subsequent prompt decay to same-sign lepton pair. This occurs for O(1) Yukawa coupling of the scalar triplet with charged leptons, which is expected for reasonably small vacuum expectation values of the neutral component of the triplet field that governs the neutrino mass generation in the type-II seesaw. We present our analysis for two different final states, 3l+≥1j and an inclusive ≥2l+≥1j channel. Considering its decay to electrons only, we find that the doubly-charged Higgs boson with a mass around a TeV could be observed at the 3σ confidence level with O(200)  fb−1 of integrated luminosity, while masses up to 2 TeV could be probed within a few years of data accumulation. The signal proposed here becomes essentially background free, if it is triggered in the μμ mode and a 5σ discovery is achievable in this channel for a TeV-scale doubly-charged Higgs boson with an integrated luminosity as low as O(50)  fb−1. We also highlight the sensitivity of FCC-eh to the Yukawa coupling responsible for the production of the doubly-charged Higgs boson as a function of its mass in both the ee and μμ channels."],["dc.identifier.doi","10.1103/PhysRevD.99.115015"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16262"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/93402"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation","info:eu-repo/grantAgreement/EC/H2020/690575/EU//InvisiblesPlus"],["dc.relation.eissn","2470-0029"],["dc.relation.issn","2470-0010"],["dc.rights","CC BY 4.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject","Doubly-charged Higgs boson; electron-proton collider"],["dc.subject.ddc","530"],["dc.title","Doubly-charged Higgs boson at a future electron-proton collider"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","101"],["dc.contributor.author","Chun, Eung Jin"],["dc.contributor.author","Khan, Sarif"],["dc.contributor.author","Mandal, Sanjoy"],["dc.contributor.author","Mitra, Manimala"],["dc.contributor.author","Shil, Sujay"],["dc.date.accessioned","2020-12-10T18:25:15Z"],["dc.date.available","2020-12-10T18:25:15Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1103/PhysRevD.101.075008"],["dc.identifier.eissn","2470-0029"],["dc.identifier.issn","2470-0010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75623"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Same-sign tetralepton signature at the Large Hadron Collider and a future p p collider"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","035001"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","105"],["dc.contributor.author","Jha, Tapoja"],["dc.contributor.author","Khan, Sarif"],["dc.contributor.author","Mitra, Manimala"],["dc.contributor.author","Patra, Ayon"],["dc.date.accessioned","2022-04-01T10:02:56Z"],["dc.date.available","2022-04-01T10:02:56Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1103/PhysRevD.105.035001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/106042"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","2470-0029"],["dc.relation.issn","2470-0010"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Zooming in on eV-MeV scale sterile neutrinos in light of neutrinoless double beta decay"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]